int syscreate(char *path, int mode, uint32_t perm)
{
ERRSTACK(2);
int fd;
struct chan *c;
if (waserror()) {
poperror();
return -1;
}
openmode(mode & ~OEXCL); /* error check only; OEXCL okay here */
c = namec(path, Acreate, mode, perm);
if (waserror()) {
cclose(c);
nexterror();
}
fd = newfd(c);
if (fd < 0)
error(Enofd);
poperror();
poperror();
return fd;
}
void
sysopen(Ar0* ar0, ...)
{
Proc *up = externup();
va_list list;
char *aname;
int fd, omode;
Chan *c;
/*
* int open(char* file, int omode);
*/
va_start(list, ar0);
aname = va_arg(list, char*);
omode = va_arg(list, int);
va_end(list);
openmode(omode); /* error check only */
c = nil;
if(waserror()){
if(c != nil)
cclose(c);
nexterror();
}
aname = validaddr(aname, 1, 0);
c = namec(aname, Aopen, omode, 0);
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
ar0->i = fd;
}
void
syscreate(Ar0* ar0, ...)
{
Proc *up = externup();
char *aname;
int fd, omode, perm;
Chan *c;
va_list list;
va_start(list, ar0);
/*
* int create(char* file, int omode, uint32_t perm);
* should be
* int create(char* file, int omode, int perm);
*/
aname = va_arg(list, char*);
omode = va_arg(list, int);
perm = va_arg(list, int);
va_end(list);
openmode(omode & ~OEXCL); /* error check only; OEXCL okay here */
c = nil;
if(waserror()) {
if(c != nil)
cclose(c);
nexterror();
}
c = namec(validaddr(aname, 1, 0), Acreate, omode, perm);
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
ar0->i = fd;
}
void
chanfd::newfd (svccb *sbp)
{
assert (sbp->prog () == REX_PROG && sbp->proc () == REX_NEWFD);
rex_newfd_arg *argp = sbp->Xtmpl getarg<rex_newfd_arg> ();
assert (argp->channel == channo);
if (argp->fd < 0 || implicit_cast<size_t> (argp->fd) >= fdi.size ()
|| fdi[argp->fd].weof) {
warn ("newfd invalid fd %d\n", argp->fd);
sbp->replyref (rex_newfd_res (false));
return;
}
int fds[2];
if (socketpair (AF_UNIX, SOCK_STREAM, 0, fds) < 0) {
warn ("socketpair: %m\n");
sbp->replyref (rex_newfd_res (false));
return;
}
close_on_exec (fds[0]);
close_on_exec (fds[1]);
fdinfo *fdip = &fdi[argp->fd];
/* Need to make sure file descriptors get sent no later than data */
if (!fdip->fdsendq.empty ())
fdip->wuio.breakiov ();
fdip->fdsendq.push_back (fds[0]);
rex_newfd_res res (true);
*res.newfd = newfd (fds[1]);
sbp->replyref (res);
}
int syscreate(char *path, int mode, uint32_t perm)
{
ERRSTACK(2);
int fd;
struct chan *c;
if (waserror()) {
poperror();
return -1;
}
openmode(mode & ~O_EXCL); /* error check only; OEXCL okay here */
c = namec(path, Acreate, mode, perm);
if (waserror()) {
cclose(c);
nexterror();
}
fd = newfd(c, mode); /* 9ns mode is the O_FLAGS and perm is glibc mode */
if (fd < 0)
error(-fd, ERROR_FIXME);
poperror();
poperror();
return fd;
}
int syspipe(int fd[2])
{
ERRSTACK(1);
struct dev *d;
struct chan *c[2];
static char *names[] = { "data", "data1" };
d = &devtab[devno("pipe", 0)];
c[0] = 0;
c[1] = 0;
fd[0] = -1;
fd[1] = -1;
if (waserror()) {
/* need to remove from the fd table and make sure the chan is closed
* exactly once. if fd[i] >= 0, then the fd is valid (or it was!) and
* the fd table has the only ref (newfd() currently decrefs/consumes the
* reference). cclose() doesn't care if you pass it 0 (like kfree()). */
if (fd[0] >= 0)
close_fd(¤t->open_files, fd[0]);
else
cclose(c[0]);
if (fd[1] >= 0)
close_fd(¤t->open_files, fd[1]);
else
cclose(c[1]);
poperror();
return -1;
}
c[0] = namec("#pipe", Atodir, 0, 0);
c[1] = cclone(c[0]);
if (walk(&c[0], &names[0], 1, FALSE, NULL) < 0)
error(EINVAL, ERROR_FIXME);
if (walk(&c[1], &names[1], 1, FALSE, NULL) < 0)
error(EINVAL, ERROR_FIXME);
c[0] = d->open(c[0], O_RDWR);
c[1] = d->open(c[1], O_RDWR);
fd[0] = newfd(c[0], 0);
if (fd[0] < 0)
error(-fd[0], ERROR_FIXME);
fd[1] = newfd(c[1], 0);
if (fd[1] < 0)
error(-fd[1], ERROR_FIXME);
poperror();
return 0;
}
void
sysdup(Ar0* ar0, ...)
{
Proc *up = externup();
int nfd, ofd;
Chan *nc, *oc;
Fgrp *f;
va_list list;
va_start(list, ar0);
/*
* int dup(int oldfd, int newfd);
*
* Close after dup'ing, so date > #d/1 works
*/
ofd = va_arg(list, int);
oc = fdtochan(ofd, -1, 0, 1);
nfd = va_arg(list, int);
va_end(list);
if(nfd != -1){
f = up->fgrp;
lock(&f->r.l);
if(nfd < 0 || growfd(f, nfd) < 0) {
unlockfgrp(f);
cclose(oc);
error(Ebadfd);
}
if(nfd > f->maxfd)
f->maxfd = nfd;
nc = f->fd[nfd];
f->fd[nfd] = oc;
unlockfgrp(f);
if(nc != nil)
cclose(nc);
}else{
if(waserror()) {
cclose(oc);
nexterror();
}
nfd = newfd(oc);
if(nfd < 0)
error(Enofd);
poperror();
}
ar0->i = nfd;
}
void
sysfauth(Ar0* ar0, va_list list)
{
Chan *c, *ac;
char *aname;
int fd;
/*
* int fauth(int fd, char *aname);
*/
fd = va_arg(list, int);
aname = va_arg(list, char*);
aname = validaddr(aname, 1, 0);
aname = validnamedup(aname, 1);
if(waserror()){
free(aname);
nexterror();
}
c = fdtochan(fd, ORDWR, 0, 1);
if(waserror()){
cclose(c);
nexterror();
}
ac = mntauth(c, aname);
/* at this point ac is responsible for keeping c alive */
cclose(c);
poperror(); /* c */
free(aname);
poperror(); /* aname */
if(waserror()){
cclose(ac);
nexterror();
}
fd = newfd(ac);
if(fd < 0)
error(Enofd);
poperror(); /* ac */
/* always mark it close on exec */
ac->flag |= CCEXEC;
ar0->i = fd;
}
ssize_t
chanfd::readfd (int fdn, void *buf, size_t len, bool &fdrecv)
{
int rfd;
ssize_t n = ::readfd (fdi[fdn].fd, buf, len, &rfd);
if (rfd >= 0) {
fdrecv = true;
close_on_exec (rfd);
rexcb_newfd_arg arg;
arg.channel = channo;
arg.fd = fdn;
arg.newfd = newfd (rfd, false);
ref<bool> okp (New refcounted<bool> (false));
c->call (REXCB_NEWFD, &arg, okp,
wrap (this, &chanfd::newfdrep, arg.newfd, okp));
}
return n;
}
long
sysopen(ulong *arg)
{
int fd;
Chan *c;
openmode(arg[1]); /* error check only */
validaddr(arg[0], 1, 0);
c = namec((char*)arg[0], Aopen, arg[1], 0);
if(waserror()){
cclose(c);
nexterror();
}
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
return fd;
}
long
syscreate(ulong *arg)
{
int fd;
Chan *c;
openmode(arg[1]&~OEXCL); /* error check only; OEXCL okay here */
validaddr(arg[0], 1, 0);
c = namec((char*)arg[0], Acreate, arg[1], arg[2]);
if(waserror()) {
cclose(c);
nexterror();
}
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
return fd;
}
long
_sysopen(char *name, int mode)
{
int fd;
Chan *c = 0;
openmode(mode); /* error check only */
if(waserror()){
if(c)
cclose(c);
nexterror();
}
c = namec(name, Aopen, mode, 0);
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
return fd;
}
int
kcreate(char *path, int mode, ulong perm)
{
int fd;
volatile struct { Chan *c; } c;
c.c = nil;
if(waserror()) {
cclose(c.c);
return -1;
}
openmode(mode&~OEXCL); /* error check only; OEXCL okay here */
c.c = namec(path, Acreate, mode, perm);
fd = newfd(c.c);
if(fd < 0)
error(Enofd);
poperror();
return fd;
}
long
sysfauth(ulong *arg)
{
Chan *c, *ac;
char *aname;
int fd;
validaddr(arg[1], 1, 0);
aname = validnamedup((char*)arg[1], 1);
if(waserror()){
free(aname);
nexterror();
}
c = fdtochan(arg[0], ORDWR, 0, 1);
if(waserror()){
cclose(c);
nexterror();
}
ac = mntauth(c, aname);
/* at this point ac is responsible for keeping c alive */
poperror(); /* c */
cclose(c);
poperror(); /* aname */
free(aname);
if(waserror()){
cclose(ac);
nexterror();
}
fd = newfd(ac);
if(fd < 0)
error(Enofd);
poperror(); /* ac */
/* always mark it close on exec */
ac->flag |= CCEXEC;
return fd;
}
long
syscreate(uint32 *arg)
{
int fd;
Chan *c = 0;
char *name;
openmode(arg[1]&~OEXCL); /* error check only; OEXCL okay here */
if(waserror()) {
if(c)
cclose(c);
nexterror();
}
name = uvalidaddr(arg[0], 1, 0);
c = namec(name, Acreate, arg[1], arg[2]);
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
return fd;
}
long
sysdup(ulong *arg)
{
int fd;
Chan *c, *oc;
Fgrp *f = up->fgrp;
/*
* Close after dup'ing, so date > #d/1 works
*/
c = fdtochan(arg[0], -1, 0, 1);
fd = arg[1];
if(fd != -1){
lock(f);
if(fd<0 || growfd(f, fd)<0) {
unlockfgrp(f);
cclose(c);
error(Ebadfd);
}
if(fd > f->maxfd)
f->maxfd = fd;
oc = f->fd[fd];
f->fd[fd] = c;
unlockfgrp(f);
if(oc)
cclose(oc);
}else{
if(waserror()) {
cclose(c);
nexterror();
}
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
}
return fd;
}
int sysdup(int old)
{
ERRSTACK(1);
int fd;
struct chan *c;
if (waserror()) {
poperror();
return -1;
}
c = fdtochan(¤t->open_files, old, -1, 0, 1);
if (c->qid.type & QTAUTH) {
cclose(c);
error(EPERM, ERROR_FIXME);
}
fd = newfd(c, 0);
if (fd < 0) {
cclose(c);
error(-fd, ERROR_FIXME);
}
poperror();
return fd;
}
int
kcreate(char *path, int mode, ulong perm)
{
int fd;
Chan *c;
if(waserror())
return -1;
openmode(mode&~OEXCL); /* error check only; OEXCL okay here */
c = namec(path, Acreate, mode, perm);
if(waserror()) {
cclose(c);
nexterror();
}
fd = newfd(c);
if(fd < 0)
error(Enofd);
poperror();
poperror();
return fd;
}
int sysfauth(int fd, char *aname)
{
ERRSTACK(2);
struct chan *c, *ac;
if (waserror()) {
poperror();
return -1;
}
validname(aname, 0);
c = fdtochan(¤t->open_files, fd, O_RDWR, 0, 1);
if (waserror()) {
cclose(c);
nexterror();
}
ac = mntauth(c, aname);
/* at this point ac is responsible for keeping c alive */
poperror(); /* c */
cclose(c);
if (waserror()) {
cclose(ac);
nexterror();
}
fd = newfd(ac, 0);
if (fd < 0)
error(-fd, ERROR_FIXME);
poperror(); /* ac */
poperror();
return fd;
}
static void
sysrfork(void)
{
u32int flags;
int rc, i;
Process *p;
Segment *s, *t;
Fd *old;
flags = arg(0);
if(systrace)
fprint(2, "rfork(%#o)\n", flags);
if((flags & (RFFDG | RFCFDG)) == (RFFDG | RFCFDG) ||
(flags & (RFNAMEG | RFCNAMEG)) == (RFNAMEG | RFCNAMEG) ||
(flags & (RFENVG | RFCENVG)) == (RFENVG | RFCENVG)) {
P->R[0] = -1;
cherrstr("bad arg in syscall");
return;
}
if((flags & RFPROC) == 0) {
if(flags & RFFDG) {
old = P->fd;
P->fd = copyfd(P->fd);
fddecref(old);
}
if(flags & RFCFDG) {
old = P->fd;
P->fd = newfd();
fddecref(old);
}
P->R[0] = noteerr(rfork(flags), 0);
return;
}
incref(&nproc);
p = emallocz(sizeof(Process));
memcpy(p, P, sizeof(Process));
for(i = 0; i < SEGNUM; i++) {
s = p->S[i];
if(s == nil)
continue;
if((flags & RFMEM) == 0 && i != SEGTEXT || i == SEGSTACK) {
t = emallocz(sizeof(Segment));
incref(t);
t->size = s->size;
t->start = s->start;
t->dref = emalloc(sizeof(Ref) + s->size);
memset(t->dref, 0, sizeof(Ref));
incref(t->dref);
t->data = t->dref + 1;
memcpy(t->data, s->data, s->size);
p->S[i] = t;
} else {
incref(s->dref);
incref(s);
}
}
if(flags & RFFDG)
p->fd = copyfd(P->fd);
else if(flags & RFCFDG)
p->fd = newfd();
else
incref(P->fd);
incref(P->path);
rc = rfork(RFMEM | flags);
if(rc < 0) /* this should NEVER happen */
sysfatal("rfork failed wtf: %r");
if(rc == 0) {
P = p;
atexit(cleanup);
P->pid = getpid();
inittos();
addproc(P);
}
P->R[0] = rc;
}
chanfd::chanfd (u_int32_t cn, ref<aclnt> cc, const vec<int> f, pid_t p)
: chanbase (cn, cc, p), destroyed (New refcounted<bool> (false))
{
for (size_t i = 0; i < f.size (); i++)
newfd (f[i]);
}
int
lfdfd(int fd)
{
return newfd(lfdchan(fd));
}
